Signaling device



Sept. 8, 1931. T. J. SCOFIELDI ET AL SIGNALING DEVICE Filed Dec. 1. 1930 2 Sheets-Sheet 1 NYA'NID Sept. 8, 1931. T. SCQFIELD ET AL 1,822,574

' SIGNALING DEVICE I Filed Dec. 1, 1930 2 SheetsSheet 2 Patented Sept. 8, 1931 UNITED. STATES rArE r OFFICEV THEODORE J. SCOFIELD AN D FRED w. BILLIG, 0F JACKSON,'MICHIGAN, ASSIGNORS T0 THE SPARKS-WITHINGTON COMPANY, OF JACKSON, MICHIGAN," :A CORPORATION OF OHIO SIGNALING nnvrcn -App1 ication filed December 1, 1930, Serial No. 499,334.

This invention relates to certain new. and useful improvements in signaling devices.

The main object of the invention is toproduce a signaling device of eflicient, economical and durable construction and which shall have a pleasing appearance While adapted for mounting, with small consumption of space.

Further detailed objects reside in. a particu lar disposition of the elements, their form and relation and the method ofrelative securement, all as will more fully appear from the following description taken in connection with the accompanying drawingsin whichz Figure 1 is a front elevation of the signaling device.

Figure 2 is a section on line 22, Figure 1. Figure 3 is a perspective view of the screen. Figure 4 is an enlarged view of a brokenaway section of the screen. 7

Figure 5 is a section on line 55, Figure 1. Generally speaking, the signaling device, as illustrated, is of the diaphragm type, and as the operating mechanism therefor forms no portion of this invention, the actual means for vibrating the diaphragm has; not been illustrated as any usual well-known mechanism may be provided; the same, however, is

preferably ofthe magnetically actuated type.

The structure, as shown, comprises a diaphragm casing. 1 comprising a rear .diaphragm case section 2 and a front diaphragm case section or ring 3, between which sections the edge or periphery of a substantially circular diaphragm 4 is clamped, the two sections being secured together .in any suitable manner as by bolts 5, any number of which may be provided. y

In the particular structure illustrated, the diaphragm 4 carries a supplemental free edge diaphragm, or resonator 6, all in a manner well known in this art...

It has been customary in the use of structures similar to the one so far described, to provide an elongated projector or megaphone for directing and amplifying the sound waves. The present structure departs from that form of device in the provision of a concavo-convex cover or cap 7 provided at its edge with an annular flange 8 fitting around and outside of the edge'of the diaphragm case 7 rigidly provided witha plurality of openings adapted to permit the passage of sound waves as generated by vibration of the diaphragm at and resonator 6.

In view of the fact that in the use of device of this character, dust, dirt and foreign mattertend to pass throughthe openings intlie cap or cover and collect on the operating parts of the mechanism tending to reduce its efficiency, we have provided a wire mesh screen 30 of un que form and supported in a novel manner andwhich adds tothe design and appearance of the signaling device and 1n which the screen is maintained position. I p

The form of this screen is perhaps best illustrated in Figure'3, and comprises a central substantially circular section 11 formed and permanentlyin a predetermined.

with radial projecting flanges 12 spaced.

apart by cutaway portions or recesses 13 in the periphery of the screen. The central portion of the screen is preferably concavoconvex conforming substantially to the general contour of the cover or cap 7 and the.

projecting portions or flanges 12 are deflected ,2

or ofi's'et rearwardly so, as to lie at an angle to the general contour of the screen.

For the purpose of securing the screen to the cover, thescreen may beprovided with a central opening l tfitted over a stud 15 secured to cover 7 and is held in position on the stud as by means of nut 16.

When the cover 7 carrying the screen 30 portions 10 in the cover, or with bolts 5 through the diaphragm casing, and the de lisfitted over the edge of the diaphragm case 1, the recesses 13 register with depressed screen, and this redeflecting of the portions 12, maintains the screen at all times, under tension between the cover 7 and the ring 3, and by this means of utilizing a single stud 15 and nut 16, the screen is maintained tightl in desired position covering the openings 1 and 18 in the cap or cover 7 to prevent the entry of foreign matter to the space within the cover.

For the purpose of adding to the pleasing ornamental appearance of the horn, the screen, as best illustrated in Figure f, has sections 20 and 21 of different colors. For illustration, as here shown, the concentric central openings 18 disclose a portion 20 of the screen which is colored red, and the outer concentric-ally arranged opening 17 disclose portions 21 of the screen that are colored blue so that in addition to its mechanical function, the screen, as here positioned, is made to constitute an ornamental feature of the device.

The effectiveness of this coloring is increased by also coloring the diaphragm 4 and the resonator 6 with colors conforming with the color of that portion of the screen which they are directly behind or with which portions of their surfaces register.

The resultant structure is of ornamental, pleasing appearance, efficient in operation and relatively permanent in construction, and although we have shown and described aspecific construction of s gnaling device and the particular arrangement and relation of the parts thereof, we do not desire to restrict ourselves to any particular form or construction of operating mechanism or to any preferred details as disclosed, except as the same may be definitely included in the claims hereto appended.

\Ve claim:

1. A signaling device comprising a diaphragm case, a vibratorydiaphragm carried thereby, a front cover for said case and having openings therethrough, means for securing the front cover to the diaphragm case and a screen interposed between the diaphragm and the case and covering the openings in the latter and said screen having an edge portion deflected when the cover is secured in position with respect to the case, to thereby maintain such edge portion under tension and hold the screen in position.

2. A signaling device comprising a diaphragm case, a vibratory diaphragm carried thereby, a front cover for said case and having openings therethrough, means for securing the front cover to the diaphragm case and a screen interposed between the diaphragm and the case and covering the openings in the latter and said screen having flanges at its edge deflected when the cover is secured in position with respect to the diaphragm case to maintain the flanges under tension and hold the screen in position.

3. A signaling device comprising a diaphragm case including a rear case section and a front case section, a diaphragm having its edge clamped between said sections, a convex cover having openings therethrough and a marginal flange telescoped with the diaphragm case, a screen between the diaphragm and the cover and having flanged portions tensioned to maintain the screen in position when the cover is secured to the diaphragm case, and means for securing the cover to the diaphragm case.

4. In a signaling device, a diaphragm case, a diaphragm carried thereby, a convex cover having openings therethrough, a screen between the diaphragm case and the cover and having edge flanges normally bent so as to lie at an angle to the normal contour of the screen, means for securing the cover to the diaphragm case, such securement of the parts acting to deflect the bent edges of the screen and place them under tension to maintain the screen in position.

, 5. A signaling device comprising a diaphragm case, a vibratory diaphragm carried thereby, a front cover for said case and having openings therethrough, means for securing the front cover to the diaphragm case and a screen interposed between the diaphragm and the case and covering the openings 1n the latter, means for malntaming the screen in position, and additional means for sccuring the screen to the cover.

6. A si nahn device com )rism a dia- 23 b b phragm case, a vibratory diaphragm carried thereby, a front cover for said case and having openings therethrough, means for securing the front cover to the diaphragm case and a screen interposed between the diaphragm and the case and covering the openings in the latter and said screen having an edge portion deflected when the cover is secured in position with respect to the case, to thereby maintain such edge portion under tension and hold the screen in position, and additional means for securing the screen to the cover.

7. A signaling device comprising a diaphragm case, a vibratory diaphragm carried thereby, a front cover for said case and having openings therethrough, means for securing the front cover to the diaphragm case and a screen interposed between th e diaphragm and the case and covering the openings inthe latter and said screen having flanges at its edge deflected when the cover is secured in position with respect to the diaphragm case to maintain the flanges under tension and hold the screen in position, and additional means for securing the screen to the cover.

8. A signaling device comprising a diaphragm case including a rear case section and a front case section, a diaphragm having its edge clamped between said sections, a convex cover having openings therethrough and a llU 1 lii marginal flange telescoped with the diaphragm case, a screen between the diaphragm and the cover and having flanged port-ions tensioned to maintain the screen in position when the cover is secured to the diaphragm case, and means for securing the cover to the diaphragm case, and additional means for securing the screen to the cover.

9. In a signaling device, a diaphragm case, a diaphragm carried thereby, a convex cover having openings therethrough, a screen between the diaphragm case and the cover and having edge flanges normally bent so as to lie at an angle to the normal contour of the screen, means for securing the cover to the diaphragm case, such securement of the parts acting to deflect the bent edges of the screen and place them under tension to maintain the screen in position, and additional means for securing the screen to the cover.

10. A signaling device comprising a diaphragm case, a vibratory diaphragm carried thereby, a front cover for said case and having openings therethrough, means for securing the front cover to the diaphragm case and a screen interposed between the diaphragm and the case and covering the openings in the latter, and means for maintaining the screen in position, said screen having secti ons differently colored and registering with various openings in the cover.

11. A signaling device comprising a diaphragm case, a vibratory diaphragm carried thereby, a front cover for said case and having openings therethrough, means for securing the front cover to the diaphragm case and a screen interposed between the diaphragm and the case and covering the openings in the latter and said screen having an edge portion deflected when the cover is secured in position with respect to the case, to thereby maintain such edge portion under tension and hold the screen in position, said screen having sections differently colored and registering with various openings in the cover.

12. A signaling device comprising a diaphragm case, a vibratory diaphragm carried thereby, a front cover for said case and having openings therethrough, means for securing the front cover to the diaphragm case and a screen interposed between the diaphragm and the case and covering the openings in the latter and said screen having flanges at its edge deflected when the cover is secured in position with respect to the diaphragm case to maintain the flanges under tension and hold the screen in position, said screen having sections differently colored and registering with various openings in the cover.

13. A signaling device comprising a diaphragm case including a rear case section and a front case section, a diaphragm having its edge clamped between said sections, a convex cover having openings therethrough and a marginal flange telescoped with the diaphragm case, a screen between the diaphragm and the cover and having flanged portions tensioned to maintain the screen in position when the cover is secured to the diaphragm case, and means for securing the cover to the tain the screen in position, said screen having 7 sections differently colored and registering with various openings in the cover.

15. A signaling device comprising a diaphragm case, a vibratory diaphragm carried thereby, a front cover for said case and having openings therethrough, means for secur ing the front cover to the diaphragm case and a screen interposed between the diaphragm and the case and covering the openings in the latter, means for maintaining the screen in position, additional means for securing the screen to the cover, said screen having sections differently colored and registering with various openings in the cover.

In witness whereof we have hereunto set our hands this 19th day of November 1930.

THEODORE J. SGOFIELDI. FRED W. BILLIG. 

